Hypodermic syringe



ug, 4, 1931., l G N, HEIN 1,817,003

HYPODERMIC SYRINGE Filed April 26, 1924 fnvej z 011 Patented Aug. 4,1931 UNITED STATES PATENT OFFICE GEORGE N. HEIN, F SAN FRANCISCO,CALIFORNIA HYPODERMIC sYnINGE nppneauon med April 2e, 1924. serial No.709,152.

to be applied is deposited. To eject the fluid a piston is employed andthe same is inserted into'l the barrel through its open end. In someIcases, first charges of material such as cartridges, medically termedampules, are inserted in the barrel and the contents thereof is, on themovement of the piston discharged through the needle.

The present invention relates broadly to what may be termed a two-partsyringe, one part constituting a tubular piston mounting the needle andthe hand grip and the other constituting an ampule or cartridge servingas a barrel and having telescopic movement over the piston in thedischarge of its contents.

In addition to the objects set forth in the immediately precedingparagraph, the invention has for another object to provide an improvedform of ampule having a puncturable closure serving as an expellingpiston head; another object is the'incorporationvin the piston of ameans for puncturing the ampule the same to be maintained sealed untilthat time when it is desired to expel the contents therefrom; anotherobject is to provide in connectionl with the piston,

when necessary, a barrel for receiving the material to be appliedthrough the syringe by the material being directly deposited therein orreceived therein by the depositin of the sealed ampule.`

With the above mentioned and other objects in view, the inventionconsists in the novel construction and combination of parts hereinafterdescribed, illustrated in the accompanying drawings, and set forth inthe claims hereto appended, it being understood that various changes inthe form, proportion, size and minor details of construction within thescopeof the claims may be resorted to without departing from the spiritor sacrificing any of the advantages of the invention.

Fig. 1 is a view in longitudinal section of yby the use of a hypodermicsyringe.

one embodiment of my invention with the ampule serving as the applyingbarrel.

Fig. 2 is a view in longitudinal section of the needle base mounting theampule puncturing needle and the hypodermic needle.

Fig. 3 is a longitudinal sectional view of a modified form ofconstruction and Fig. 4 is a view in elevation of the constructionillustrated in Fig. 3.

Figure 5 is a longitudinal sectional view of a holder showing an ampuleplaced therein anda portion of the piston structure.

Inthe drawings, the numeral 1 indicates the elongated shell of anysuitable material preferably circular in cross section closed at one endas at 2 and open at its opposite end as at 3, the same forming an ampulefor containing a charge of liquid 4 to be ap lied Xfter the fluid hasbeen deposited in. the ampule the open end 3 thereof is closed by amember 5 of any suitable puncturable material such as cork or rubber.The member 5 is adapted for reciprocating movement within the ampule.with its peripheral edge lin tight frictional contact with the innerWall of the ampuleA and. thereby serving as an expelling piston orwasher. The center of the ampule is relatively thin as at 6 for thehereinafter described purpose.

The numeral 7 indicates a piston having a tubular open ended bore 8extending longitudinally thereof, one end of said bore having insertedthereinto a demountable needle base 9 havin threaded' engagementtherewith. A tubu ar needle 10 is provided preferably extendinglongitudinally of the piston 8 to a point to project beyond the endthereof as in Fig. 1. A detachable needle is thereby provided so it maybe readily sterilized or may be changed for diii'erent patients or atwill. The puncturing point of the needle 10 extends through an openingin the piston head 1l detachably secured to the end of the piston 7 andclosing the boreY 8 thereof. As illustrated, the puncturing point of theneedle 10 projects a suiiicient distance beyondthe end wall of thepiston head to pass through the Wall 6 of the lclosure 5 on pressurebeing applied to the ampule 2 I end and by an operator endeavoring toforce the ampule over the piston as hereinafter described. Extendingoutwardly from the base 9 and communicating with the needle.

10 is a conventional hypodermic needle 12.

To enable the operator to grasp the piston, a suitable member 13 isdetachablyI threaded as at 14 or otherwise secured to the end of thepiston 7 and the same carries linger grip portions 15.

`When in use the device described operates in the following manner.

The operator takes the sealed ampule and fits the same over the pistonhead 11, en-

gages the fingers under the members 15 and applies the pressure of thethumb to the end 2 of the ampule. This application of pressure causesthe end of the needle 10 to puncture the closure 5 and provide an outletfor the contents of the ampule through needle 10 and through needle 12.The continued application of pressure to the end of ampule 2 forces theclosure 5 longitudinally within the'same and the closure acts as apiston discharging the liquid from the ampule through the needles 10 and12.

surface of the ampule and protects the Ipisf ton from injury. In thisconstruction illustrate a barrel 23 having a chamber 24 open at one endinto which may be inserted the ampule or into which may be deposited theHuid to be applied, in either case the application of pressure on theend of the arrel forces the material longitudinally through needles 10and 12 and discharges it from the end of needle 12. Y.

It will be observed that the closure for the single open end of theampule serves as a piston and is punctured providing an outet for thefluld.

.I claim:

1. A hypodermic syringe including a tubular piston, a hypodermic needledetachably associated with one end thereof, a piston head associatedwith the other end, a tubular puncturin element projecting beyond theplston hea and communicating with the tubular piston, finger grippingmembers carried by the piston, a fluid container closed at one end and`provided with an open mouth and adapted for positioning with the Pistonhead. received in its open or telescopic movement over the and saidclosure.

piston, wherebythe contents of the container, discharges through thetubular piston, and a sealing member for the mouth vof the container andadapted for beiig punctured by the puncturing element on the receptionof the piston in the end ofthe container and for movement into thecontainer in advanceof the piston.

2. A hypodermic syringe including a tubular piston, a shell surroundingthe same connectedy ltherewith affording an annular chamber surroundingthe piston, a hypodermic needle associated with one end of the piston, apiston head with the other end of the piston, a tubular puncturingmember projecting beyond the pistonhead, a barrel provided at one endwith a chamber open at one end into which said piston is adapted forreception with the chamber Wall enterino the chamber between the pistonVand shel and finger gripping members associated with the shell.

3. A hypodermic syringe comprising a needle base, an elongated tubularpiston removably secured to one end portion of said needle base, afinger grip memberhaving an annular central portion secured at one endto the piston, said piston slidably receiving and anampule thereon and aportion of the piston being of substantially the same diameter as 'theinner diameter of the ampule, and a needle in said piston for conveyingfluid from the ampule to a passage formed in the needle base, fordelivery to a hypodermic needle secured to said base.

4. A hypodermic syringe comprising a needle base, a piston of elongateduniform size for slidably receiving and guiding an ampule thereonthroughout its length, and a tubular shell having handle extensions on lone end, the opposite end of saidl shell and oneend of the-needle baseand piston respectively being formed for interlocking cooperation insyringe forming relation, said piston having a needle passage for thedischarge of Huid from the ampule to the needle base and a hypodermicneedle carried thereby.

5. A hypodermic syringe including a tubular piston, a hypodermic needledetachably associated with the end' thereof, a tubular: puncturin needlecommunicating with the hypodermic needle and for reception within thetubular piston with its end projecting beyond the end of the piston,finger gripping members associa-ted with the piston, a cylindricalmember provided with asingle opening at one" end for the reception ofthe end of the piston and for telescopic movement thereover, and apuncturable closure for the open end of the member and through whichsaid puncturing needle projects on the contact of. the piston with 6. Ahypodermic syringe comprising a needle base, a tubular piston, a tubularshell, said piston and shell having concentric spaced relationship andbeing connected at their lower ends, and said needle base removablyassociated with said lower end, handles on said shell, a piston headmounted in one end of the piston and of a diameter to snugly fit thewall of the cylindrical fluid containing member 'to be positionedthereover, a tubular needle mounted in said piston head and needle base,said needle base being adapted vto receive a hypodermic needle, and acylindrical fluid containing member open at one end, adapted to beslidably received on said tubular piston and head for discharging thecontents through said tubular needle. A

7. A hypodermic syringe comprising a needle base, a piston structureremovably assembled on said lbase and including a head for frictionalengagement with the wall of a container to be moved thereover, a sleevemember removably mounted on the lower portion of the piston structureand extending ,in spaced concentric relation around said pistonstructure to form' a guideway in` cooperation with said pistonstructure, said needle base being adapted to mount a hypodermic needle,handles on said sleeve member, and a cylindrical container formed toslidably fit said piston structure and said guideway for dischargingliquid contents through av passage in the piston structure and thehypodermic needle in the movement thereof onto the piston.

8. A hypodermic syringe comprising a needle base, an elongated tubularpiston removably secured to one end portion of said needle base, aiinger gripv member having an annular central portion 4secured at oneend to the piston, a portion of said piston being of the same diameteras the interior of an ampule for slidably receiving and guiding anampule thereon, and a needle in said piston for conveying fluid from theampule for delivery to a hypodermic needle secured to said base.

9. A hypodermic syringe including a needle base, a tubular piston, afinger grip member, said needle base, tubular piston and linger gripmember being assembled in syringe forming relation, a hypodermic needledetachably associated with said needle base, a puncturing needleassociated with and projecting beyond the end of the piston, acylindrical member provided'with a single opening at one end for thereception of the piston and for telescopic movement thereover, animperforate closure for the open end of said cylindrical member andadapted to be punctured by said puncturing needle, whereby the contentsof said cylindrical member are conducted to said hypodermic needle whensaid cylindrical member is moved towards said needle base.

10. A hypodermic syringe adapted to use liquid-containing ampules withimperforate cork closure, comprising an elongated outer shell member, aringer grip member mounted on the shell member, a tubular needle basedetachably mounted at one end of the shell member and adapted to mountat one end of its tube a hypodermic needle, a piston. mounted at one ofits ends within one end of the outer shell, a barrel plunger memberremovably and telescopically slidable within the outer shell and adaptedto receive 4therein an ampule, a tubular perforating member extendingbeyond the other end of the piston, providing a continuous passage-Wayfor the contents of the ampule to the hypodermic needle.

11. A hypodermic syringe adapted to use liquid-containing ampules withimperforate cork closure, comprising a -mounting structure composed ofan elongated outer shell member and a piston concentric of the centralportion of the shell member, a tubular puncturing needle memberdetachably associated with said mounting structure, and an extensionbase member having a passage therethrough and adapted to mount adetachable hypodermic needle at an end of said passage.

l2. A hypodermic syringe adapted to use liquid-containing ampules withimperforate cork closure, comprising a mounting structure composed of anelongated outer shell member and a piston concentric of the centralportion of the shell member, a tubular puncturing needle memberdetachably associated with said mountingv structure, and an extensionbase member having a passage therethrough and adapted to mount adetachable hypodermic needle at an end of said passage, an'd a plungerbarrel member having 'a chamber therein adapted to receive an ampuleclosed by an imperforate cork in such manner that the cork is puncturedby the said puncturing needle upon pressure on the plunger.

In testimony whereof I have signed my name to this specification.

GEORGE N. HEIN.

